Gas-engine.



R. lJ. LEAGH. GAS ENGINE. v APPLICATION FILED AUG. 2, 1909.

95 8,881 Patented May 24, 1910.

- \'y NIMA/Wouw OPE/MT50.

i -fmdff l 5 `through the sideV of thecylinder 6, into the ltheconstruction" of, a tivo-eycleg engine proved an'd' the "speed and powerof'the .v nove-l con st'ruct'ionf'ofl atwofcyelegas engine A through-'myimproved two-cycle as engine,

showing the piston atv4 the endo its down- Ward Stroke. '1 Fig. 2 is anend view of the piston removed'rom the .engine and shovvvalve, 8, .theexhaust valve, 9', lthe compression chamber, 10, the auxiliarycompression usual Way.- Y The cy Atake port 17, controlled by the mtakevalve` .'40

' cylinder into .50'.The

- the lower'end .of the piston 11, and a hea 23,"h'aving a' dishedupperface 24, and a -packing box 25, through 'A Be it known that '1,

. ing. at Seekonk, inthe coun'tyfof ABristol and State of Massachusetts,have invented a new .'and useful. Improvement' in Gas-Engines, of

which the 'following a specification.

' piston with the. 'peri' 1 atedv :plate removed'-, and showing' theclrcular 'chamber inthe Vend vthe cran-k and 16,.`the .crank shaftrotatably fthe exhaust valve 8, an exp chamber 19, when the plston is atthe .end of its vdownward stroke, a duct 21,-extend1'ng iran sfrafras'ammonia J'Ac'oB Lascia, or

P rnNT QFFCE-f l j sunxonx, Massaouusnrrsgi exs-Encina.'

V1909. serial-N0. 510,888.

To all whom 'it muy concern: l

,RAYMOND JACOB' LEACH, a-'cltizen of the-Unitedf States, resid- Myinvention 'has reference to an improvement 4in gas engines' and" mor'eJvparticularly' toa'nj improvement in two-cycle gas engines.

The object of my invention-iste improve whereby the operationV offthe'engiiie-A is 1mengine materially' increased.'

. -My invention consists an the peculiar and having details' ofconstruction',= as vWill be more u ll-y set forthhereina-fter andclaimed. Figure 1 'is la 'vertical sectional 'v ievv ing thev perforated.plate -in'the end-fofthe piston,I and Fig. 3 1sv an end' 'viewgof thevofthe piston. .'In the drawings' 5 indicates .the frameof the engine,6, t e cylinder, 7, the intake chamber, 11, the piston, -12'thepistonrod, 13, the-cross-Lhea d, 14, the connecting rod,'15,

supported in bearings on the frame 5, the

inder 6,.'has a lower in- 7, an upper exhaust port5'1'8` controlled bylesion chamber 19, av lay-pass 20. indirectly connectingthe compression'chamber' 9 v with the explosion compression chamber 9, and a sparkplug`22,

extending through 'the upper end of the' the explosionA chamberv 19,"tcompression chamber 9, formed by. the 'Walls-of 'the' lower end of thecyllnder 6 "l rod 12, extends,'a sfshown in-Fig.' 1. The

-which' the piston -intothecylinder end, -as 'showninFig 1'.'

The piston l1, is'constructed to have a circular concentricchainber 26,in the-top, a port 27, extending from the chamber-12,6, out- Wardtthrough the-:side-,of thef'piston and af. perforated plate 28, formingthet'op 4ofi thel chamber 26, and' securedto the topof the piston'by'anut 29, on the end. of thepi'ston rod 12, which extends throughacentralrhole in' the plate. The nut v29,' also secures the pistonv 11,.to the piston4 rod 12, as. 'shovvnin ig' 1.

10', is preferably `in the forml-of a lhollow end' of tliecylinder 6,.by same' The auxiliary compression chamber' globular -body connected 'toa, va'lve '30, hav'- ing a lever 31 andthe valve. 30, is connected by apipe 32, to the duct 21, in the side of the cylinder 6, as-shovvn inFig.r 1..

piston 11,' compresses the revious Acharge of taneously a charge ofgasis dravvnthrough thei'ntake port 17,' and the v byass 20 intol- Inthe operation of'my 'improved two- ,cycle gas engme, an .upvvardstrokefof the` exhaust valve '8, now opens and the' burned gases are exhausted't rough the exhaust 'port '18, and the exhaust valve then closes.

At the end`of the downward stroke of thepiston 11,- the port'27, inthepiston coincides shown in Flg. '1, and the compressed gas is forced byexpansion from the compression chamber 9,v and .the auxiliarycompression chamber 10,'. through the'b pass 20, the port 27, and thecircular cham er 26, inthe'p1s "ton and out through the perforations inthe ,plate 2 8,- into the explosion chamber19,y

e 1n 'lelvger ldown'ward thus cutting out the aux- `'iliary' compressionchamber 10, Th1s reduces the compression area andthe compression/of theses is materially 'creased 1n compression head 23, is-preferablyv'sernired to the loyver L,creased speed from .the compression chamberwith the upper end 'of the by-.pass 20, as'

" When the-engine 1s used as a high the valve 30,1.is 'closed by'movmgthe-v the compression chamber 9,- Whi increased.

forcesthe gasesat agreitefr 1n- 9, intol the explosion chamber 19,thereby-inv creasing' the s eed'of thefengine. Any vari A,ation intermeiat'e a low or high speed may claim as new'and. desire to secure byLettersA ward and inward, in a positionto coincide with a port'in the.piston when the piston is' at the downward llmit ofits stroke,'an in?be obtained `by vary-ing the position of the -'valve 3.0,l between itsextremeopen or closed v"position, vThe peculiar and. novel construetionffofthe chamber-in the piston and the perforated plate gives 'abetter'mixture of the. ses and'a more perfect combustion is obtained.-'A 1 VHaving thus described my invention, I

Patent 1. Ima two-cycle gas engine, in combination, u .cylinder havingan exhaust port at the upper' end onthe side and a head secured to thelower end,.a piston in the cylinder dividing thesame into aeompressionchamber and an explosion chamber,`a by-passin'the side of the cylinderat the lower end, extending from. the compression chamber uptakel portat the-lower. end of the cylinder exten ing into the by-pass, anautomatic valvej controlling the lintake port, a mechanically operatedvalve controllingv the exhaustV port, a piston having a concentriccircula'ichamber in its upper end, Aa port extending from the circularchamber through thes'ide of the piston in a'position to coineide withthe upper end of the by-pass when the, p'iston is at the downward limitof its stroke,' a circular into the piston an forming the top of; the

' circular chamber, a shouldered piston rod having a reduced portionscrewthreaded on the end and extending through a central hole in thepiston and a central hole in the perforated plate and a nut on the.screw- (perorated plate recessedthreaded en d of the piston rodengaging'with the perforated plate.

2Q In a two-cycle gaseng'ine, in co1nbination, a cylinder having. aclosed upper end an .internally screw-threaded lower end,

,walls forming an' exhaust port at the'upper. V

end on the side, a by-'pas's in the side exj tendingfror'n thelower endupward and iii-.

ward and an intake port on the -side extend 'so ing into the byfpass,all lformed Integral, an automa-tic valve controlling the intake ort,`

a mechanically operated valve contro ling ing an explosion chamber andthe lower end' a l compression chamber connected with the inder' whenthepiston is 'at'.the, downward limit ofgits stroke, a circularperforated 'plate the exhaust port, an externally screw-thread' ed headclosing the lower end-of the cylinder, the upper end of the cylindercons titut V recessed int/0 the'j piston and forming .the top of thecircular chamber, a shouldered piston y,

rod vextending through a'stuiling box 'on the head closing the lower endof the cylinder;

and having areduced portion screwthreaded on the endand extendingthrough a cen- Atral holejin' the piston. and a central hole in -4 l theperforatedplate and a' nut on the screwthreaded end' of thepistn withthe perforated plate;

In testimony whereof,

Arod engaging I have signed my name to this specication. in the presenceof two subscribing witnesses.

RAYMOND JACOB Witnesses: v

LEON E. DANFQRTH, JULIA RICCI.

LEI/ICH;

ssi

